Ask for the title of a small Japanese movie!

The story goes something like this: the unemployment rate in Japan increased at a rate of 15% every year after the war, and the BR method was born. Every year, a class is selected from all schools in Japan as the experimental object of BR method, so as to find out the person with the most survival value.

A group of children who were still high school students were stunned and taken to an uninhabited island. An electronic instrument is tied around each of them's necks to know their exact location on the island. The game has begun. They must find out all their companions within 3 days and kill each other. After 3 days, if two people survive at the same time, the electronic device around their necks will automatically explode because they survived. There can only be one person. Each of them will have some food, a map and some props for outdoor life. At the same time, they also include a "weapon". The murder weapon may not be a gun, but a pot cover, a telescope, a sickle, etc. When an officer reports his student number, he must leave the military region and start the game.

The first one is that a girl made a little noise while watching the video of BR game rules, and was shot in the brain by the instructor with a knife. The second one was a boy. He didn't believe the instructor said that the instrument on his neck would explode, so the instructor detonated the electronic instrument and sprayed blood from his neck. He died in just a few seconds. What's it like to watch his ex-partner kill each other?

The girl with a sickle left a deep impression on me. She killed her companion with a sickle and sought self-protection. Finally, he was shot and killed by his classmates. She just doesn't want to do nothing. The boy's name is Sancun, and his uncle is a military expert. He and two other partners used computer hackers to access the monitoring system on the island, which completely paralyzed the system. With their wisdom, they found a weapon that could cause a huge explosion. However, just before he and his partner,